<?php
class Phpzip extends Think {
	private $ctrl_dir = array();
	private $datasec  = array();

	 /**********************************************************
	  * 压缩部分
	  * **********************************************************/
	// ------------------------------------------------------ //
	// #遍历指定文件夹
	//
	// $archive  = new PHPZip();
	// $filelist = $archive->visitFile(文件夹路径);
	// print "当前文件夹的文件:<p>\r\n";
	// foreach($filelist as $file)
	// printf("%s<br>\r\n", $file);
	// ------------------------------------------------------ //
	var $fileList = array();
	public function visitFile($path)
	{
		global $fileList;
		$path = str_replace("\\", "/", $path);
		$fdir = dir($path);
		while(($file = $fdir->read()) !== false)
		{
			if($file == '.' || $file == '..'){ continue; }
			$pathSub    = preg_replace("*/{2,}*", "/", $path."/".$file);  // 替换多个反斜杠
			$fileList[] = is_dir($pathSub) ? $pathSub."/" : $pathSub;
			if(is_dir($pathSub)){ self::visitFile($pathSub); } }
			$fdir->close();
			return $fileList;
	}

	private function unix2DosTime($unixtime = 0)
	{
		$timearray = ($unixtime == 0) ? getdate() : getdate($unixtime);
		if($timearray['year'] < 1980)
		{
			$timearray['year']    = 1980;
			$timearray['mon']     = 1;
			$timearray['mday']    = 1;
			$timearray['hours']   = 0;
			$timearray['minutes'] = 0;
			$timearray['seconds'] = 0;
		}
		return (
			($timearray['year'] - 1980) << 25)
			| ($timearray['mon'] << 21)
			| ($timearray['mday'] << 16)
			| ($timearray['hours'] << 11)
			| ($timearray['minutes'] << 5)
			| ($timearray['seconds'] >> 1);
	}

	   var $old_offset = 0;
	   private function addFile($data, $filename, $time = 0)
	   {
		     $filename = str_replace('\\', '/', $filename);
		     $dtime    = dechex(self::unix2DosTime($time));
		     $hexdtime = '\x' . $dtime[6] . $dtime[7]
		     . '\x' . $dtime[4] . $dtime[5]. '\x'
		     . $dtime[2] . $dtime[3]. '\x'
		     . $dtime[0] . $dtime[1];

		     eval('$hexdtime = "' . $hexdtime . '";');

		     $fr       = "\x50\x4b\x03\x04";
		     $fr      .= "\x14\x00";
		     $fr      .= "\x00\x00";
		     $fr      .= "\x08\x00";
		     $fr      .= $hexdtime;
		     $unc_len  = strlen($data);
		     $crc      = crc32($data);
		     $zdata    = gzcompress($data);
		     $c_len    = strlen($zdata);
		     $zdata    = substr(substr($zdata, 0, strlen($zdata) - 4), 2);
		     $fr      .= pack('V', $crc);
		     $fr      .= pack('V', $c_len);
		     $fr      .= pack('V', $unc_len);
		     $fr      .= pack('v', strlen($filename));
		     $fr      .= pack('v', 0);
		     $fr      .= $filename;
		     $fr      .= $zdata;
		     $fr      .= pack('V', $crc);
		     $fr      .= pack('V', $c_len);
		     $fr      .= pack('V', $unc_len);
		     $this->datasec[] = $fr;
		     $new_offset      = strlen(implode('', $this->datasec));
		     $cdrec  = "\x50\x4b\x01\x02";
		     $cdrec .= "\x00\x00";
		     $cdrec .= "\x14\x00";
		     $cdrec .= "\x00\x00";
		     $cdrec .= "\x08\x00";
		     $cdrec .= $hexdtime;
		     $cdrec .= pack('V', $crc);
		     $cdrec .= pack('V', $c_len);
		     $cdrec .= pack('V', $unc_len);
		     $cdrec .= pack('v', strlen($filename) );
		     $cdrec .= pack('v', 0 );
		     $cdrec .= pack('v', 0 );
		     $cdrec .= pack('v', 0 );
		     $cdrec .= pack('v', 0 );
		     $cdrec .= pack('V', 32 );
		     $cdrec .= pack('V', $this->old_offset );
		     $this->old_offset = $new_offset;
		     $cdrec .= $filename;

		     $this->ctrl_dir[] = $cdrec;
	 }

	var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
	private function file(){
		$data    = implode('', $this->datasec);
		$ctrldir = implode('', $this->ctrl_dir);
		return   $data . $ctrldir. $this->eof_ctrl_dir
			.pack('v', sizeof($this->ctrl_dir))
			.pack('v', sizeof($this->ctrl_dir))
			.pack('V', strlen($ctrldir))
			.pack('V', strlen($data)). "\x00\x00";
	}

	// ------------------------------------------------------ //
	// #压缩到服务器        //
	// $archive = new PHPZip();
	// $archive->Zip("需压缩的文件所在目录", "ZIP压缩文件名");
	// ------------------------------------------------------ //
	 public function Zip($dir, $saveName)
	 {
		 if(@!function_exists('gzcompress'))
		 {
		 	ECHO 'fuck';exit;
		 	return;
		 }

		 $filelist = self::visitFile($dir);
		 if(count($filelist) == 0)
		 { return; }

		 foreach($filelist as $file)
		 {
			 if(!file_exists($file) || !is_file($file)){ continue; }
			 $fd       = fopen($file, "rb");
			 $content  = @fread($fd, filesize($file));
			 fclose($fd);
			 // 1.删除$dir的字符(./folder/file.txt删除./folder/)
			  // 2.如果存在/就删除(/file.txt删除/)
			  $file = substr($file, strlen($dir));
			  if(substr($file, 0, 1) == "\\" || substr($file, 0, 1) == "/"){ $file = substr($file, 1); }
			  self::addFile($content, $file);
			 }
			 $out = self::file();
			 $fp = fopen($saveName, "wb");
			 fwrite($fp, $out, strlen($out));
			 fclose($fp);
	 }

	 // ------------------------------------------------------ //
	 // #压缩并直接下载        //
	 // $archive = new PHPZip();
	 // $archive->ZipAndDownload("需压缩的文件所在目录");
	 // ------------------------------------------------------ //
	   public function ZipAndDownload($dir)
	   {
		   if(@!function_exists('gzcompress'))
		   {
		   		return;
		   }

		   $filelist = self::visitFile($dir);

		   if(count($filelist) == 0)
		   { return; }

		   foreach($filelist as $file)
		   {
			   if(!file_exists($file) || !is_file($file)){ continue; }
			   $fd       = fopen($file, "rb");
			   $content  = @fread($fd, filesize($file));
			   fclose($fd);

			   // 1.删除$dir的字符(./folder/file.txt删除./folder/)
			   // 2.如果存在/就删除(/file.txt删除/)
			   $file = substr($file, strlen($dir));
			   if(substr($file, 0, 1) == "\\" || substr($file, 0, 1) == "/")
			   {
		   	   	$file = substr($file, 1); }
				self::addFile($content, $file);
			   }
				$out = self::file();
				@header('Content-Encoding: none');
				@header('Content-Type: application/zip');
				@header('Content-Disposition: attachment ; filename=Farticle'.date("YmdHis", time()).'.zip');
				@header('Pragma: no-cache');
				@header('Expires: 0');
				print($out);
	   }

    /*********************************************************** 解压部分 **********************************************************/
    // ------------------------------------------------------ //
    // ReadCentralDir($zip, $zipfile)
    // $zip是经过@fopen($zipfile, 'rb')打开的
    // $zipfile是zip文件的路径
    // ------------------------------------------------------ //
	private function ReadCentralDir($zip, $zipfile)
	{
		$size     = filesize($zipfile);
		$max_size = ($size < 277) ? $size : 277;
		@fseek($zip, $size - $max_size);
		$pos   = ftell($zip);
		$bytes = 0x00000000;
		while($pos < $size){
			$byte  = @fread($zip, 1);
			$bytes = ($bytes << 8) | Ord($byte);
			$pos++;
			if($bytes == 0x504b0506){ break; }
		}
		$data = unpack('vdisk/vdisk_start/vdisk_entries/ventries/Vsize/Voffset/vcomment_size',
		fread($zip, 18));
		$centd['comment']      = ($data['comment_size'] != 0) ? fread($zip, $data['comment_size']) : '';  // 注释
		$centd['entries']      = $data['entries'];
		$centd['disk_entries'] = $data['disk_entries'];
		$centd['offset']       = $data['offset'];
		$centd['disk_start']   = $data['disk_start'];
		$centd['size']         = $data['size'];
		$centd['disk']         = $data['disk'];
		return $centd;
	}


   private function ReadCentralFileHeaders($zip)
   {
	    $binary_data = fread($zip, 46);
	    $header      = unpack('vchkid/vid/vversion/vversion_extracted/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len/vcomment_len/vdisk/vinternal/Vexternal/Voffset', $binary_data);
	    $header['filename'] = ($header['filename_len'] != 0) ? fread($zip, $header['filename_len']) : '';
	    $header['extra']    = ($header['extra_len']    != 0) ? fread($zip, $header['extra_len'])    : '';
	    $header['comment']  = ($header['comment_len']  != 0) ? fread($zip, $header['comment_len'])  : '';

	    if($header['mdate'] && $header['mtime'])
	    {
		    $hour    = ($header['mtime']  & 0xF800) >> 11;
		    $minute  = ($header['mtime']  & 0x07E0) >> 5;
		    $seconde = ($header['mtime']  & 0x001F) * 2;
		    $year    = (($header['mdate'] & 0xFE00) >> 9) + 1980;
		    $month   = ($header['mdate']  & 0x01E0) >> 5;
		    $day     = $header['mdate']   & 0x001F;
		    $header['mtime'] = mktime($hour, $minute, $seconde, $month, $day, $year);
	    } else {
	    $header['mtime'] = time();            }
	    $header['stored_filename'] = $header['filename'];
	    $header['status'] = 'ok';

	    if(substr($header['filename'], -1) == '/'){
	    	$header['external'] = 0x41FF0010;
	    }  // 判断是否文件夹
	    return $header;
    }

	private function ReadFileHeader($zip)
	{
		$binary_data = fread($zip, 30);
		$data        = unpack('vchk/vid/vversion/vflag/vcompression/vmtime/vmdate/Vcrc/Vcompressed_size/Vsize/vfilename_len/vextra_len', $binary_data);
		$header['filename']        = fread($zip, $data['filename_len']);
		$header['extra']           = ($data['extra_len'] != 0) ? fread($zip, $data['extra_len']) : '';
		$header['compression']     = $data['compression'];
		$header['size']            = $data['size'];
		$header['compressed_size'] = $data['compressed_size'];
		$header['crc']             = $data['crc'];
		$header['flag']            = $data['flag'];
		$header['mdate']           = $data['mdate'];
		$header['mtime']           = $data['mtime'];

		if($header['mdate'] && $header['mtime']){
			$hour    = ($header['mtime']  & 0xF800) >> 11;
			$minute  = ($header['mtime']  & 0x07E0) >> 5;
			$seconde = ($header['mtime']  & 0x001F) * 2;
			$year    = (($header['mdate'] & 0xFE00) >> 9) + 1980;
			$month   = ($header['mdate']  & 0x01E0) >> 5;
			$day     = $header['mdate']   & 0x001F;
			$header['mtime'] = mktime($hour, $minute, $seconde, $month, $day, $year);
		}else{
			$header['mtime'] = time();
		}
		$header['stored_filename'] = $header['filename'];
		$header['status']          = "ok";
		return $header;
	}


	private function ExtractFile($header, $to, $zip)
	{
		$header = self::readfileheader($zip);
		if(substr($to, -1) != "/"){ $to .= "/"; }
		if(!@is_dir($to)){ @mkdir($to, 0777); }
		$pth = explode("/", dirname($header['filename']));
		for($i=0; isset($pth[$i]); $i++){
			if(!$pth[$i]){ continue; }
			$pthss .= $pth[$i]."/";
			if(!is_dir($to.$pthss)){ @mkdir($to.$pthss, 0777); }
		}

		if(!($header['external'] == 0x41FF0010) && !($header['external'] == 16))
		{
			if($header['compression'] == 0)
			{
			$fp = @fopen($to.$header['filename'], 'wb');
			if(!$fp){ return(-1); }
			$size = $header['compressed_size'];
			while($size != 0)
			{
				$read_size   = ($size < 2048 ? $size : 2048);
				$buffer      = fread($zip, $read_size);
				$binary_data = pack('a'.$read_size, $buffer);
				@fwrite($fp, $binary_data, $read_size);
				$size       -= $read_size;
			}

				fclose($fp);
				touch($to.$header['filename'], $header['mtime']);
			}else{
				$fp = @fopen($to.$header['filename'].'.gz', 'wb');
				if(!$fp)
				{
					return(-1);
				}

				$binary_data = pack('va1a1Va1a1', 0x8b1f, Chr($header['compression']), Chr(0x00), time(), Chr(0x00), Chr(3));
				fwrite($fp, $binary_data, 10);
				$size = $header['compressed_size'];
				while($size != 0)
				{
					$read_size   = ($size < 1024 ? $size : 1024);
					$buffer      = fread($zip, $read_size);
					$binary_data = pack('a'.$read_size, $buffer);
					@fwrite($fp, $binary_data, $read_size);
					$size       -= $read_size;
				}
				$binary_data = pack('VV', $header['crc'], $header['size']);
				fwrite($fp, $binary_data, 8);
				fclose($fp);
				$gzp = @gzopen($to.$header['filename'].'.gz', 'rb') or die("Cette archive est compress!");
				if(!$gzp){ return(-2); }
					$fp = @fopen($to.$header['filename'], 'wb');
				if(!$fp)
				{
					return(-1);
				}

				$size = $header['size'];
				while($size != 0)
				 {
				 	$read_size   = ($size < 2048 ? $size : 2048);
				 	$buffer      = gzread($gzp, $read_size);
				 	$binary_data = pack('a'.$read_size, $buffer);
				 	@fwrite($fp, $binary_data, $read_size);
				 	$size       -= $read_size;
				 }
			 	fclose($fp); gzclose($gzp);
			 	touch($to.$header['filename'], $header['mtime']);
			 	@unlink($to.$header['filename'].'.gz');
			}
		}

		return true;
	}

		// ------------------------------------------------------ //
		// #解压文件        //
		// $archive   = new PHPZip();
		// $zipfile   = "ZIP压缩文件名";
		// $savepath  = "解压缩目录名";
		// $zipfile   = $unzipfile;
		// $savepath  = $unziptarget;
		// $array     = $archive->GetZipInnerFilesInfo($zipfile);
		// $filecount = 0;
		// $dircount  = 0;
		// $failfiles = array();
		// set_time_limit(0);
		// 修改为不限制超时时间(默认为30秒)
		//
		// for($i=0; $i<count($array); $i++) {
		//     if($array[$i][folder] == 0){
		//         if($archive->unZip($zipfile, $savepath, $i) > 0){
		//             $filecount++;
		//         }else{
		//             $failfiles[] = $array[$i][filename];
		//         }
		//     }else{
		//         $dircount++;
		//     }
		// }
		// set_time_limit(30);
		//printf("文件夹:%d&nbsp;&nbsp;&nbsp;&nbsp;解压文件:%d&nbsp;&nbsp;&nbsp;&nbsp;失败:%d<br>\r\n", $dircount, $filecount, count($failfiles));
		//if(count($failfiles) > 0){
		//    foreach($failfiles as $file){
		//        printf("&middot;%s<br>\r\n", $file);
		//    }
		//}
		    // ------------------------------------------------------ //

		    public function unZip($zipfile, $to, $index = Array(-1))
		    {
		    	$ok  = 0;
		    	$zip = @fopen($zipfile, 'rb');
		    	if(!$zip){ return(-1); }
		    	$cdir      = self::ReadCentralDir($zip, $zipfile);
		    	$pos_entry = $cdir['offset'];
		    	if(!is_array($index)){ $index = array($index); }
		    	for($i=0; $index[$i]; $i++)
		    	{
		    		if(intval($index[$i]) != $index[$i] || $index[$i] > $cdir['entries'])
		    		{
		    			return(-1);
		    		}
		    	}
		    	for($i=0; $i<$cdir['entries']; $i++)
		    	{
		    		@fseek($zip, $pos_entry);
		    		$header          = self::ReadCentralFileHeaders($zip);
		    		$header['index'] = $i;
		    		$pos_entry       = ftell($zip);
		    		@rewind($zip);
		    		fseek($zip, $header['offset']);
		    		if(in_array("-1", $index) || in_array($i, $index))
		    		{
		    			$stat[$header['filename']] = self::ExtractFile($header, $to, $zip);
		    		}
		    	}
		    	fclose($zip);
		    	return $stat;
		    }

		     /**********************************************************         * 其它部分         **********************************************************/
		    // ------------------------------------------------------ //
		     // #获取被压缩文件的信息        //
		     // $archive = new PHPZip();
		     // $array = $archive->GetZipInnerFilesInfo(ZIP压缩文件名);
		     // for($i=0; $i<count($array); $i++) {
		     //     printf("<b>&middot;%s</b><br>\r\n", $array[$i][filename]);
		      //     foreach($array[$i] as $key => $value)
		      //         printf("%s => %s<br>\r\n", $key, $value);
		      //     print "\r\n<p>------------------------------------<p>\r\n\r\n";
		      // }
		      // ------------------------------------------------------ //
		      public function GetZipInnerFilesInfo($zipfile)
		      {
			      	$zip = @fopen($zipfile, 'rb');
			      	if(!$zip){ return(0); }
			      	$centd = self::ReadCentralDir($zip, $zipfile);
			      	@rewind($zip);
			      	@fseek($zip, $centd['offset']);
			      	$ret = array();
			      	for($i=0; $i<$centd['entries']; $i++)
			      	{
			      		$header          = self::ReadCentralFileHeaders($zip);
			      		$header['index'] = $i;
			      		$info = array(
			      		'filename'        => $header['filename'], // 文件名
			      		'stored_filename' => $header['stored_filename'],            // 压缩后文件名
			      		'size'            => $header['size'],                       // 大小
			      		'compressed_size' => $header['compressed_size'],            // 压缩后大小
			      		'crc'             => strtoupper(dechex($header['crc'])),    // CRC32
			      		'mtime'           => date("Y-m-d H:i:s",$header['mtime']),  // 文件修改时间
			      		'comment'         => $header['comment'],                    // 注释
			      		'folder'          => ($header['external'] == 0x41FF0010 || $header['external'] == 16) ? 1 : 0,  // 是否为文件夹
			      		'index'           => $header['index'],                      // 文件索引
			      		'status'          => $header['status']                      // 状态
			      		 );
			      		 $ret[] = $info;
			      		 unset($header);
			      	}
			      	fclose($zip);
			      	return $ret;
		      }

      // ------------------------------------------------------ //
      // #获取压缩文件的注释        //
      // $archive = new PHPZip();
      // echo $archive->GetZipComment(ZIP压缩文件名);
      // ------------------------------------------------------ //
      public function GetZipComment($zipfile)
      {
	      $zip = @fopen($zipfile, 'rb');
	      if(!$zip){ return(0); }
	      $centd = self::ReadCentralDir($zip, $zipfile);
	      fclose($zip);
	      return $centd[comment];
      }
}
?>
